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# Copyright 2016 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tests for CleanupThread."""
import threading
import time
import unittest
from grpc import _common
_SHORT_TIME = 0.5
_LONG_TIME = 5.0
_EPSILON = 0.5
def cleanup(timeout):
if timeout is not None:
time.sleep(timeout)
else:
time.sleep(_LONG_TIME)
def slow_cleanup(timeout):
# Don't respect timeout
time.sleep(_LONG_TIME)
class CleanupThreadTest(unittest.TestCase):
def testTargetInvocation(self):
event = threading.Event()
def target(arg1, arg2, arg3=None):
self.assertEqual('arg1', arg1)
self.assertEqual('arg2', arg2)
self.assertEqual('arg3', arg3)
event.set()
cleanup_thread = _common.CleanupThread(
behavior=lambda x: None,
target=target,
name='test-name',
args=('arg1', 'arg2'),
kwargs={
'arg3': 'arg3'
})
cleanup_thread.start()
cleanup_thread.join()
self.assertEqual(cleanup_thread.name, 'test-name')
self.assertTrue(event.is_set())
def testJoinNoTimeout(self):
cleanup_thread = _common.CleanupThread(behavior=cleanup)
cleanup_thread.start()
start_time = time.time()
cleanup_thread.join()
end_time = time.time()
self.assertAlmostEqual(
_LONG_TIME, end_time - start_time, delta=_EPSILON)
def testJoinTimeout(self):
cleanup_thread = _common.CleanupThread(behavior=cleanup)
cleanup_thread.start()
start_time = time.time()
cleanup_thread.join(_SHORT_TIME)
end_time = time.time()
self.assertAlmostEqual(
_SHORT_TIME, end_time - start_time, delta=_EPSILON)
def testJoinTimeoutSlowBehavior(self):
cleanup_thread = _common.CleanupThread(behavior=slow_cleanup)
cleanup_thread.start()
start_time = time.time()
cleanup_thread.join(_SHORT_TIME)
end_time = time.time()
self.assertAlmostEqual(
_LONG_TIME, end_time - start_time, delta=_EPSILON)
def testJoinTimeoutSlowTarget(self):
event = threading.Event()
def target():
event.wait(_LONG_TIME)
cleanup_thread = _common.CleanupThread(behavior=cleanup, target=target)
cleanup_thread.start()
start_time = time.time()
cleanup_thread.join(_SHORT_TIME)
end_time = time.time()
self.assertAlmostEqual(
_SHORT_TIME, end_time - start_time, delta=_EPSILON)
event.set()
def testJoinZeroTimeout(self):
cleanup_thread = _common.CleanupThread(behavior=cleanup)
cleanup_thread.start()
start_time = time.time()
cleanup_thread.join(0)
end_time = time.time()
self.assertAlmostEqual(0, end_time - start_time, delta=_EPSILON)
if __name__ == '__main__':
unittest.main(verbosity=2)
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